Corrosion of metals and alloys. Guidelines for selection of protection methods against atmospheric corrosion

2002 ◽  
Keyword(s):  
Atmospheric Corrosion ◽  
Metals And Alloys ◽  
Selection Of

Specific features of glass applied for high-speed micrometallurgical casting of microwires

2019 ◽  
pp. 76-81
Author(s):  
O. V. Vasilieva ◽  
T. S. Vinogradova ◽  
A. V. Parchukov ◽  
B. V. Farmakovsky
Keyword(s):  
High Speed ◽  
Metals And Alloys ◽  
Basic Composition ◽  
Glass Insulation ◽  
Glass Tubes ◽  
Selection Of ◽  
Glass Compositions

The present paper provides a justification for the selection of the basic composition of the system SiO2–B2O3–MgO–BaO–Na2O–K2O; its additional alloying with such elements as oxides PbO, Na2O + K2O, ZrO2 and TiO2 alters the main characteristics of glass tubes for casting microwires. The proposed glass compositions vary significantly the range of metals and alloys used to produce cast microwires in glass insulation.

Atmospheric Corrosion Behavior Assessment of Carbon Steel Pipes Using Cyclic Salt Spray Test

2015 ◽  
Vol 658 ◽  
pp. 42-52
Author(s):  
Polporn Chatisathien ◽  
Nuttapon Suttitam
Keyword(s):  
Carbon Steel ◽  
Corrosion Behavior ◽  
Atmospheric Corrosion ◽  
Salt Spray ◽  
Metals And Alloys ◽  
Salt Spray Test ◽  
Cover Plate ◽  
Steel Pipes ◽  
Inner Surface ◽  
Welded Pipe

Accelerated atmospheric corrosion behavior of carbon steel pipes subjected to cyclic salt spray test was performed according to ISO 14993 – Corrosion of metals and alloys – Accelerated testing involving cyclic exposure to salt mist, “dry” and “wet” conditions [1]. In order to investigate the effect of degree of exposure to environment of inner surface of the pipe on corrosion behavior of inner surface of the specimens, degree of completeness of weldment, 0%, 50%, 80%, and 100%, of steel cover plate is varied. Exposure times in this study are 168, 336, and 504 hours which can be correlated to 10, 20, and 30 years exposed to C3 corrosivity category according to the definition of ISO 9223 – Corrosion of metals and alloys – Corrosivity of atmospheres – Classification, determination and estimation [2,3]. After testing, visual inspection on outer and inner surfaces of the specimens were performed. In addition, average corrosion rate of the specimens were performed according to ISO 8407 – Corrosion of metals and alloys – Removal of corrosion products from corrosion test specimens [4]. The results show that as-received steel pipe specimens exhibited great degree of corrosion attack on the inner surface of the specimens while slight amount of corrosion was observed from the welded pipe specimens.

The new ICDD Metals and Alloys Indexes: Usefulness and potentialities

1994 ◽  
Vol 9 (4) ◽  
pp. 239-245 ◽  
Author(s):  
P. L. Wallace ◽  
S. Weissmanna ◽  
M. H. Mueller ◽  
L. D. Calveit ◽  
R. Jenkins
Keyword(s):  
Powder Diffraction ◽  
Metals And Alloys ◽  
Chemical Information ◽  
Powder Diffraction File ◽  
Pearson Symbol ◽  
Symbol Code ◽  
The Common ◽  
Characterization Of Materials ◽  
Selection Of

The Metals and Alloys Indexes, published by the International Centre for Diffraction Data, contain four indexes. These are: (a) the alphabetical formula index (AFI); (b) the Pearson symbol code index; (c) the common name index; and (d) the Strukturbericht symbol index. These indexes (which contain metals, alloys, and related phases in the Powder Diffraction File) have been designed to be used independently or in conjunction with the Powder Diffraction File to facilitate the characterization of materials. All data in these indexes have been critically reviewed. The organization, selection of materials, and use of alphabetical formulas are similar to those of standard metallurgical references such as Pearson or Villars and Calvert. The arrangement of the AFI promotes systematic searches for chemical analogs and assists users in locating possible matches when only partial chemical information is available. The structural indexes aid in characterization by correlations to prototype and related structures. Some applications of the indexes are given here.

scholarly journals Optimum selection of zinc-coated cable trunking systems for electrical installations based on atmospheric corrosion prediction

2018 ◽  
Vol 1 (2) ◽  
pp. 5-19
Keyword(s):  
Atmospheric Corrosion ◽  
Environmental Parameters ◽  
First Year ◽  
Logarithmic Function ◽  
Atmospheric Conditions ◽  
Optimum Selection ◽  
Selection Of

The study presents a methodology for the optimum selection of the most suitable zinc-based coatings in metallic trunking systems to fulfill the requirements related to atmospheric corrosion resistance. The current methodologies are based on heuristic procedures that do not consider the influence of the in situ atmospheric conditions, which are the main cause of most of the corrosion problems. The effect of corrosion over time is generally estimated using a logarithmic function, which depends on corrosion during the first year of exposure, as well as on environmental parameters (e.g. temperature, humidity, pollutants, etc.). Different mathematical models for the prediction of corrosion during the first year of exposure were analyzed. Ten of these models were selected and compared with actual tests determining the model that best fitted the actual values. From this first-year corrosion value, the long-term corrosion function was calculated for each relevant commercial coating. Finally, a case study was analyzed by means of the proposed methodology. The results show the importance of the corrosion function and its influence in the selection of the coating to minimize costs.

Fatigue of structural materials in corrosive environments

2020 ◽  
pp. 56-60
Author(s):  
G.V. Pachurin ◽  
A. A. Filippov ◽  
D. A. Goncharova ◽  
A.N. Kuzmin
Keyword(s):  
Cyclic Loading ◽  
Structural Material ◽  
Fatigue Cracks ◽  
Metals And Alloys ◽  
Corrosive Environment ◽  
Deflection Curve ◽  
Operation Conditions ◽  
Factors Influencing ◽  
Corrosive Environments ◽  
Selection Of

The factors influencing the fatigue failure of metals and alloys are investigated. To increase the resource and reliability of products made of metals and alloys, taking into account their operation conditions and the presence of a corrosive environment, when justifying the selection of a structural material, it is proposed to take into account its deflection curve under cyclic loading. Keywords: structural material, corrosive environment, fatigue resistance, fatigue cracks, deflection curve, cyclic loading, durability. [email protected]

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